The following data represent the duration (in days) of pregnancies for a random sample of mothers.
277 291 295 280 268 278 291
277 282 279 296 285 269 293
267 281 286 269 264 299
Calculate the sample standard deviation of the data set. Round
your answer to the nearest tenths place.

What is the solution to the equation 9^(x+1) =27

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total